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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: PBEPBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/STO-3G
 hartrees
Energy at 0K-155.104911
Energy at 298.15K-155.113238
HF Energy-155.104911
Nuclear repulsion energy122.104101
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at PBEPBE/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3486 3184 0.01      
2 A' 3417 3122 1.45      
3 A' 3377 3085 1.38      
4 A' 3337 3048 0.77      
5 A' 3243 2963 3.92      
6 A' 1648 1505 3.30      
7 A' 1605 1466 1.66      
8 A' 1536 1404 1.70      
9 A' 1482 1354 3.58      
10 A' 1294 1182 0.68      
11 A' 1269 1159 1.00      
12 A' 1182 1080 2.28      
13 A' 1061 970 1.97      
14 A' 993 907 4.78      
15 A' 847 774 3.18      
16 A' 820 749 0.19      
17 A' 368 336 0.23      
18 A" 3479 3178 0.00      
19 A" 3402 3108 1.68      
20 A" 3330 3042 1.20      
21 A" 1641 1499 2.45      
22 A" 1564 1429 0.65      
23 A" 1259 1150 0.02      
24 A" 1226 1120 0.95      
25 A" 1173 1072 2.10      
26 A" 1160 1060 5.66      
27 A" 959 876 0.77      
28 A" 861 786 3.23      
29 A" 347 317 0.67      
30 A" 194 177 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25777.9 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 23550.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at PBEPBE/STO-3G
ABC
0.50584 0.20340 0.17894

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.351 0.411 0.000
C2 -0.897 1.311 0.000
H3 1.308 0.962 0.000
C4 0.351 -0.920 0.766
C5 0.351 -0.920 -0.766
H6 1.272 -1.221 1.288
H7 1.272 -1.221 -1.288
H8 -0.577 -1.218 1.277
H9 -0.577 -1.218 -1.277
H10 -1.819 0.701 0.000
H11 -0.910 1.962 0.896
H12 -0.910 1.962 -0.896

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.53871.10411.53571.53572.27392.27392.26872.26872.18912.19052.1905
C21.53872.23222.66882.66883.57423.57422.85162.85161.10601.10761.1076
H31.10412.23222.24592.24592.53482.53483.15233.15233.13762.59292.5929
C41.53572.66882.24591.53181.10062.27091.10082.26372.81453.14823.5578
C51.53572.66882.24591.53182.27091.10062.26371.10082.81453.55783.1482
H62.27393.57422.53481.10062.27092.57581.84923.16213.86073.87874.4342
H72.27393.57422.53482.27091.10062.57583.16211.84923.86074.43423.8787
H82.26872.85163.15231.10082.26371.84923.16212.55442.61823.21973.8660
H92.26872.85163.15232.26371.10083.16211.84922.55442.61823.86603.2197
H102.18911.10603.13762.81452.81453.86073.86072.61822.61821.79421.7942
H112.19051.10762.59293.14823.55783.87874.43423.21973.86601.79421.7929
H122.19051.10762.59293.55783.14824.43423.87873.86603.21971.79421.7929

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.673 C1 C2 H11 110.693
C1 C2 H12 110.693 C1 C4 H5 60.084
C1 C4 H6 118.265 C1 C4 H8 117.801
C1 H5 C4 60.084 C1 H5 H7 118.265
C1 H5 H9 117.801 C2 C1 C3 114.260
C2 C1 C4 120.473 C2 C1 H5 120.473
C3 C1 C4 115.625 C3 C1 H5 115.625
C4 C1 H5 59.832 C4 H5 H7 118.312
C4 H5 H9 117.679 H5 C4 H6 118.312
H5 C4 H8 117.679 H6 C4 H8 114.281
H7 H5 H9 114.281 H10 C2 H11 108.306
H10 C2 H12 108.306 H11 C2 H12 108.076
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.081      
2 C -0.231      
3 H 0.082      
4 C -0.175      
5 C -0.175      
6 H 0.084      
7 H 0.084      
8 H 0.084      
9 H 0.084      
10 H 0.080      
11 H 0.082      
12 H 0.082      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.049 0.106 0.000 0.117
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.538 0.087 0.000
y 0.087 -25.153 0.000
z 0.000 0.000 -25.143
Traceless
 xyz
x 1.610 0.087 0.000
y 0.087 -0.813 0.000
z 0.000 0.000 -0.797
Polar
3z2-r2-1.594
x2-y21.616
xy0.087
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.080 -0.218 0.000
y -0.218 3.332 0.000
z 0.000 0.000 3.028


<r2> (average value of r2) Å2
<r2> 84.768
(<r2>)1/2 9.207